Metric of cane: in 1947, Copersucar published that the manual labor needed for each ton of cane cut in usinas's lands in São Paulo was 0.47 men/day. See page 56 of Szmrecsányi, Tamás. 1979. O Planejamento da Agroindústria Canavieira do Brasil (1930-1975). São Paulo, Brazil: Editora Hucitec Universidade Estadual de Campinas. In the 1948/49 harvest, there were around 20-25 million tons of cane harvested in Brazil (https://www.agencia.cnptia.embrapa.br/gestor/cana-de-acucar/arvore/CONTAG01_62_22122006154840.html).